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Tap water quality report

Aquarion Water/Nh

EPA monitoring tested this supplier for 107 contaminants and detected 25. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

107
contaminants tested
25
detected
34,000
people served
3
health-based violations
Connecticut rankingsLead in ConnecticutPFAS in Connecticut
Water source
Ground water
Ownership
Private
Counties served
Rockingham

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

3
health-based violations
19
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1995-08-01 → 1995-08-31
MCL Health-based Archived 1995-08-01 → 1995-08-31
MCL Health-based Archived 1995-08-01 → 1995-08-31
MR Monitoring Resolved 2024-07-01 → 2024-10-01
MR Monitoring Resolved 2024-07-01 → 2024-10-01
MR Monitoring Resolved 2024-07-01 → 2024-10-01
MR Monitoring Resolved 2024-07-01 → 2024-10-01
MR Monitoring Resolved 2010-07-01 → 2010-09-30
MR Monitoring Resolved 2010-07-01 → 2010-09-30
Other Monitoring Resolved 2009-07-01

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfhxa 0.0101 µg/L 2/8 2024
Pfpea 0.0251 µg/L 2/8 2024
Pfba 0.0050 µg/L 1/8 2024
PFOA 0.0047 µg/L 1/8 2024
PFOS 0.0045 µg/L 1/8 2024

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
3600 µg/L 36%
of the EPA limit 10000 µg/L
worst single sample: 4100 µg/L
126/140 SYR4 2014–2019
Arsenic
4 µg/L 40%
of the EPA limit 10 µg/L
worst single sample: 6.5 µg/L
80/95 SYR4 2014–2019
Copper
721 µg/L 55%
of the EPA limit 1300 µg/L
worst single sample: 1300 µg/L
80/86 SYR4 2014–2019
Barium
35.8 µg/L 1.8%
of the EPA limit 2000 µg/L
worst single sample: 41 µg/L
25/25 SYR4 2014–2019
Chloroform
2.695 µg/L
No EPA limit set
worst single sample: 4.5 µg/L
22/84 SYR4 2014–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2024
Bromodichloromethane
6.475 µg/L
No EPA limit set
worst single sample: 9.7 µg/L
16/84 SYR4 2014–2019
Dibromochloromethane
10.15 µg/L
No EPA limit set
worst single sample: 13 µg/L
16/84 SYR4 2014–2019
Bromoform
4.83 µg/L
No EPA limit set
worst single sample: 4.9 µg/L
15/84 SYR4 2014–2019
TTHM
25.6 µg/L 32%
of the EPA limit 80 µg/L
worst single sample: 32.1 µg/L
14/14 SYR4 2014–2019
Dibromoacetic Acid
3.48 µg/L
No EPA limit set
worst single sample: 3.6 µg/L
13/14 SYR4 2014–2019
Lead
190 µg/L 1267%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 460 µg/L
13/61 SYR4 2014–2017
Total Haloacetic Acids (HAA5)
4.74 µg/L 7.9%
of the EPA limit 60 µg/L
worst single sample: 4.8 µg/L
13/14 SYR4 2014–2019
Combined Radium (-226 And -228)
1.75 pCi/L 35%
of the EPA limit 5 pCi/L
worst single sample: 2.1 pCi/L
11/11 SYR4 2014–2019
Combined Uranium
2.16 µg/L 7.2%
of the EPA limit 30 µg/L
worst single sample: 2.2 µg/L
9/12 SYR4 2014–2019
Gross Alpha, Excl. Radon And U
2.18 pCi/L 15%
of the EPA limit 15 pCi/L
worst single sample: 2.9 pCi/L
7/10 SYR4 2014–2019
Fluoride
185 µg/L 4.6%
of the EPA limit 4000 µg/L
worst single sample: 190 µg/L
3/25 SYR4 2014–2019
Dichloroacetic Acid
1.585 µg/L
No EPA limit set
worst single sample: 1.6 µg/L
2/14 SYR4 2014–2019
Lithium
24.9 µg/L
No EPA limit set
 2/8 UCMR-5 2024
Selenium
1.1 µg/L 2.2%
of the EPA limit 50 µg/L
 1/25 SYR4 2014–2019
82 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ERIK GUNDERSEN

Frequently asked questions about Aquarion Water/Nh

Is Aquarion Water/Nh tap water safe to drink?

EPA monitoring detected 25 contaminants in Aquarion Water/Nh's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Aquarion Water/Nh's water?

EPA monitoring detected Nitrate, Arsenic, Copper, Barium, Chloroform, and others. The full list with the level and data source for each is above.

How many people does Aquarion Water/Nh serve?

Aquarion Water/Nh reports serving 34,000 people in Connecticut, per its EPA record.

Has Aquarion Water/Nh had any water quality violations?

The EPA has 19 violations on file for Aquarion Water/Nh, of which 3 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.